This study surveys problems with English language teaching and learning and the professional development (PD) needs of high-school teachers in three provinces of three Secondary Educational Service Areas in Thailand. Both closed-and open-ended questionnaires were employed. The data was analyzed by frequency distribution and percentage; the problems and PD needs are herein presented from highest to lowest ranking. The study's results may possibly be generalized so that local organizations and institutions of higher education can provide appropriate assistance and improve the English teaching situation in Thailand in general.